Aechibald douglas beyce douglas



(No Model.)

A. D. B. DOUGLAS.

SAFE.

Patented Apr. 21j 1885.

N, PETERS. Phuwmiwgra er sung u" UNITED STATES PATENT OFFICE.

ARCHIBALD DOUGLAS BRYCE DOUGLAS, OF SEAFIELD, ARDROSSAN, OO IIITY OFAYE, SCOTLAND.

SAFE.

SPECIFICATION forming part of Letters Patent No. 316,250, dated April21, 1885.

Application iiled November 26, 1834. (No model.)

To all whom, it may concern.-

Beit known that I, ARCHIBALD DOUGLAS BEYCE DOUGLAS, a subject of theQueen of Great Britain, residing at Seafield, Ardrossan,

in the county of Ayr, Scotland, have invented new and usefulImprovements in Hanufacture of Safes, (for which I have obtained LettersPatent in Great Britain, No. 11,745, August 28, 1884,) of which thefollowing is a io specication.

My invention relates to the construction of safes and strong rooms orvaults forthe storage of nioney and articles of value, the purposethereof being to provide a novel construction of the joints uniting theplates which compose the walls of such safes or vaults, whereby greatstrength, solidity, and security are attained.

My invention consists in the several novel zo features ofconstruction-and combinations of parts, hereinafter fully set forth, andthen definitely pointed out in the claims.

Referring to the accompanying drawings, Figure 1 is a sectional viewillustrating one of the fornis in which iny invention is embodied. Fig.1 is a side elevation of the parts shown in Fig. l. Fig. 2 is a siniilarview to Fig. l, showing a niodied construction. Fig. 3 is a sectionalview showing the manner of envel- 3o oping the joint. Fig. 3 is a sideelevation of the parts shown in Fig. 3. Fig. a is a sectional viewillustrating one manner of forming the corner joint. Fig. 5 is a similarview showing a inodiiied construction. Figs. G and 7 3 5 are sectionalviews showing further modifications in the construction ofthe dovetail.Fig.

8 is an elevation of the parts shown in Fig. 6.

In the said drawings,thereference-numerals l and 2 denote adjacentportions of plates coniposing the wall of the vault or safe. The meetingedges of these plates are rabbeted, the shoulders upon each beingundercut, as shown at 3, and the edges of the plates beveled to iittherein. The overlapping portions of the plates are united by rivets 4,or by rivets in conjunction with screws 5. The joint is further securedby an outer and inner strapplate, 6, fastened by rivets 7, which alsopass through the intermediate overlapping por- 5o tions of the plates 1and 2. INhere a single strap only is used, as in Fig. 2, it may havePatented in England August 2S, 1884, No. 11,745.

l an outwardly-proj ecting central web, 6, which imparts the necessaryrigidity and strength to the joint.

In both forins of construction shown in Figs. 2 and 8, in order toenable the last or closing plate to be placed in position and stillretain the safety-joint, the overlapping portions l and 2 may be inadeshorter by the depth of the under-cut, so that they may be dropped 6ointo place, the spaces between the beveled and the undercut shouldersbeing afterward iilled by slips of hardened steel 8.

\Vhen the joint is inade at the corners or at an angle, I may forni theplates l and 2 as e5 shown in Fig. wherein the edges of the cornerplates are rabbeted and undercut, the space between the undercutshoulder upon the plate 2 and the similarly-formed rabbet upon theplates 1 being filled by slip of hard- 7o ened steel 9, in the manneralready described. An inner angle-plate, 10, is then placed over thejoint and riveted to the wall-plates by rivets 11, an outer angle-plate,l2, being then placed over the joint and fastened by rivets 13, passingthrough both the angle-plates and the intervening wall-plates.

Instead of the rabbet-joints shown in Fig.

5, I may use the dovetail shown in Figs. 6 and 7. In the foriner thedovetail forms an integral portion of the plates, and in order toperniit the latter being placed without sliding the one or the other theentire length equal portions of the wing 14 are cut away alternatelyupon each plate, as indicated in Fig. S. S5 By this construction theplates may be readily attaehed,and by a limited niovenient the dovetailswill engage and fasten the plates together. The dovetail inay, however,be constructed in the manner illustrated in Fig. 7 by cutting 9o adovetailed channel in the adjacent edge and surface of the plates, andinserting a key,

15, of hardened steel.

In each forin of joint shown the inner and outer angle-plates alreadydescribed are eniployed, the fastening-rivets 11 and 13 beingalternated, as indicated by dotted lines in Fig. 8.

By this invention I eifect the jointing of the plates in such mannerthat they make flush surfaces, and are securely keyed to each other, roogiving great strength and rigidity to the structure.

What I claim is- 1. In a safe, vault, or other similar structure, thecombination, with the rabbeted edgesV having undercut shoulders, of astrip of hard- 5 ened steel lling the space between said shoulders andthe beveled ends of the overlapping portions, and rivets uniting` thelatter, substantially as described. l

2. In a safe, Vault, or similar structure, the

1o combination, -with the wall-plates having rabbeted edges and undercutshoulders, of hardened strips filling the space between said shouldersand the beveled edges ofthe overlapping portions, an enveloping plate orplate cover- 1 5 ing the joint, and rivets connecting said platesARCHIBALD DOUGLAS BRYGE DOUGLAS.

. Witnesses:

BRADLY S. OsBoN, W. B. CARRINGTON.

